1. Department of Epidemiology and Biostatistics, Health Policy and Promotion Research Center, Qom University of Medical Sciences, Qom, Iran.
2. Department of Anesthesiology, Arak University of Medical Sciences, Arak, Iran.
3. Health Policy and Promotion Research Center, Qom University of Medical Sciences, Qom, Iran.
4. Health Promotion Research Center, Department of Epidemiology and Biostatistics, Zahedan University of Medical Sciences, Zahedan, Iran.
5. Department of Epidemiology and Biostatistics, Shahrekord University of Medical Sciences, Shahrekord, Iran.